import time
scale = 10
print("------执行开始------")
for i in range(scale + 1):
    a = '*' * i
    b = '.' * (scale - i)
    c = (i / scale) * 100
    print("\r{:^3.0f}%[{}->{}]".format(c, a, b), end='')
    time.sleep(0.1)
print("\n------执行结束------")